I have a Pacemaker and the Medalion could interfere with it. As with my cell phone I keep the Medallion away from the Pacemaker. I keep the Medallion on a retractable belt hook or in my pocket. Never had a problem having sailed a number of times. When boarding the ship, I notify Security of my Pacemaker and do not go through the metal detector, they frisk me. Your Husband should have no problem just be careful.